Gas meter



March 3, 1931. R. MARCHIANO 1,794,633

' eAs METER Filed March 51, 1927 2 Sheets-Sheet 1 lnven m F I Ware A [ano March 3, 1931. R-MARCHIANO 1,794,633

' I GAS METER q Filed March 51, 1927 2 Sheets-Sheet 2 I Hys'.

Patented Mar. 33, 1931 RINALZDO IWARCHIANO, OF GENOA, ITALY ens METER.

Application filed. March 1, 1927, seria No. 179,998, and in Italy ctober26, 1925; 7

The present invention refers to an improved gas-meter which is able to reliably work at variable gas pressure at low pressure conditions as well as at high pressure c n, ditions and by whichunauthorized operation of and tampering with the meter are pre-- in the preferred embodiment of the invention shown in the accompanying drawing in 1 which m Fig. l-i's a front elevation of the" improved: gas-meter with'the frontwall taken oil Fig.2 is a vertical sectional view on line 2-2 of Fig-1; r i Fig. 3 is a horizontal se'ctional'viewacross the gas-meter on line 3-3 ofFig. .1; Figures 4,5, 6 and?" area sectional view and perspective views respe ctively of the revolving drumof the meter.

In these figuresthe gas enters through the admission socket '1 in the chamber 2 inwhich is arranged the inlet valve 3 operated by the float 4 arranged in the distributing float chamber a. 5 is a horizontal opening in one of the walls of the float chamber a by which the water of the space of the chain er a come municates with the water of the measuring space I) in which is arranged the revolving drum 7. By the separation of the float chamher a from the measuring space 3 1n ur1ousoscillations and blows likely to occur in'tlie measuring space, arenot transmitted to the inlet valve 3. The float el and therevolving drum f'arejimmersed in the water, the common water level being indicated by the line6-6. 7 From an opening 7- of the float chamber a the gas-flows through the descending pipe 8 in the siphon 9' andthen arriv'eswithin therevolving drumf. After having passed the drum and after belng measured the gas leaves the meter through the gas outlet socket-10,

' Fig. 4: is a sectional view ofthe revolving drum without its inner parts. The drum in eludes two end walls Z and m and a conical. V the bearings and the least-wear of these m'oving partshas to be considered. [It is alsoposwall n.

V Fig. 5 is adetail inp-erspective view of one of the four blade'like'membersseen from the wall it which blades form theinner parts of the drum and'which connect the wall nwith the wall 117.. This member consists in a sector of a circle 11 which isarranged in the wall a; l of Fig. 4; the sector 1'1connects'immediately with the strongly inclined triangular walll2,

at its turn connected with a sector like wall of less inclination 13. The wall connects further, with a more inclined wall piece 14 and this latter'wall-is in its turnconnected with i a sector'15 situated in the plane of thewallm' (Fig. i) so that the sector 15 assumes its posifour radially directedcuts upon the end wall atwhich ar e'for the inlet and'four radially directed cuts upon the endwallm which are arranged for the exit of the gas.

' Fig. 6 is a perspective view of the revolving drum looking toward-the wall on which view two sectors 15 are omitted so as to better illustrate the inside of the blades.-

p F ig. 7 is perspective view of the revolvwhi ch view a part of the wall Z is'broken oil.

The gas which enters the revolving drum through the inclined mouthpiece of the tube 9,,passes the interspaces formed by two; suceter. in the chamber'afiThe blades present such a'particular conformation that Y the wa:

' ter encounters-the least resistance in traversing the drum. The' effect of the immediate admission of the gas from the distributing floatichamberfa' within the drum' is that almost the total gas volume contain'edfin the meter has already, beenmeasured'with the ling drum looking toward the wallflfand in ces'sive blades and puts the drumin rotation. i This rotation is transmittedto thetachomex'ception'of a small quantity in the chamber 1 known'meters-large quantities of gas stored 2- and in the float chamber agwhilst in the. it

within the'meter'arenot measured; The" drumnisjof small dimensions and of-a very small weight so that a very slight friction in 1 sible to rotate the drum with the speed required by the requirements of the gas consumption. V

The shaft 16 of the revolving drum is supported at one side in a bearing 17 and at the other side in the bearing 18. A wornlli) fastened on the shaft 16 transmits'the rotating motion to 'the'worm wheel 20 arranged on the vertical shaft 21; this shaft carries at its u per end a pin 22 by means of which this shaft is coupled with the shaft 23. The shaft 3 has a conical terminal 24, which tightly engages a corresponding seat of the sleeve 25'.

The shaft 23 extends through this sleeveand is supported at the upper end of the sleeve within a stuffing box 26 supplied with a studing disk of leather. 27 is a worm arranged at the upper end of the shaft 23, by means of which is operated the tachometer which records the delivered gas quantity. 28 is a spiral spring which tends to keep the shoulder 24 of the shaft 28 against the corresponding seat of the sleeve 25. By the last'described device the gas or the wateris prevented from entering the tachometer and in applying this device the tachometer immediately applied upon the outer the gas-meter.

The upper end of the tube 9 presents an inclined mouthpiece and the lowest point of this mouthpiece is situated on the line 66 of the water level. By this disposition the gas immediately reaches the revolving drum wall of whilst the tube 9 serves at the same time as an overflow; the overflowing water is admitted through the descending tube 8 within the compensation chamber 6 which has to contain the required quantity of water of compensation. This compensation chamber is limited by the bridge 29, the wall 80, the vertical wall 31 and the wall of the chamber cl and partially by the cover 32.

The water is admitted in the gas-meter by the admission socket 33; the same reaches through thepipe 34 the closed chamber cl and is obliged to ascend in thetube 35 which has its outlet opening about 10 mm; above the water level 6 6.

may be balance the weight of the spoon during its movement. By this latter device at each rotation of the revolving drum to the measuring water is adjoined a certain quantity of water so that the water level is permanently kept at the same height, whilst the exceeding wa ter quantity can be discharged across the inclined mouthpiece of the tube 9 and return by 4? Slightly below theline 46-46 and connected with the outer wall of the meter so that the tube 44 works as an overflow with hydraulic sealin the chamber 6.

With the gas-meter of the present invention unauthorized subtractlons of gas are rendered impossible as if such a subtraction should be performed the same will always be efiected 1n subtracting a gas which has already been measured.

Having thus described my invention I claim In a gas meter a revolving measuring drum including a cylindrical casing and end walls divided by cuts at right angles to each other into four circular sectors, the cuts on the one end wall being utilized for the admission and those on the other end wall for the exit of the gas, division walls connecting each circular sector at the admission end with the diagonally opposite sector at the exit end,- said division walls'being divided by two intersecting lines into three sections-,the middle section'having theshape of an elliptical sector, the extreme peripherical points of which correspond with the extreme peripher ical points of the circular sectors and in which the remaining sections are substantially of triangular form.

In testimony whereof I have: signedmy name to this specification.

In order to prevent ajdiminution of water in the measuring chamber 5 due tovaporiza 7 tion, this chamber is supplied with the known compensation spoon 36formed by a grooved lever arrcnged on the meter outside the bridge 29; This spoon performs anoscillating movement about the fulcrum 37 so that the free end of the spoon in its lowest posi tion immerses in the water of-the receptacle 6 and allows the water-to flow over the bridge 29 within themeasuring; space J?) in its elevated position. The oscillation is thusimrevolving drum. '43 is a counter-weight to 

